Hi all
Has anyone got experience of trying the large polypropylene motor run Capacitors?
AS cathode Caps on the output valves i.e. EL34/5881 not the maplin ones but the bigger type CD60 such as in this link below assuming there not fakes
http://www.ebay.co.uk/itm/CD60-AC-450V- ... 4897.l4276
What are you views?
motor run Capacitors?Advice
- colin.hepburn
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- Paul Barker
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#2
It looks too good to be true. I have never seen a polyprop cap of that capacity and voltage in that small package.
If you look at this other item they make you will see it is about the same size but only 80uF.
For that type of capacitor that is the normal power to capacity to size ratio.
The one you link is about the same size but has the expectations of an electrolytic capacitor.
So you are pioneering.
They are cheap, but tread carefully.
With regard to polyprops as a whole, they don't sound bad at all in most implementations.
If you look at this other item they make you will see it is about the same size but only 80uF.
For that type of capacitor that is the normal power to capacity to size ratio.
The one you link is about the same size but has the expectations of an electrolytic capacitor.
So you are pioneering.
They are cheap, but tread carefully.
With regard to polyprops as a whole, they don't sound bad at all in most implementations.
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein
#4
Why would have poly cap be polarised?Will wrote:Have a look at this poly cap ......
http://www.ebay.co.uk/itm/Black-DC-20V- ... 634wt_1257.
- colin.hepburn
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#5
Yep I was think much the same Paul
I am using the big ASC aluminum polyp that are filled with vegetable oil in the power supply so was just thinking if CD60 in that link could be good on the cathodes giving me a Electrolytic Cap free Amp or that was the idea
AS is my 12B4A Headphone Amp using the polyp solen caps sounds good too
I am using the big ASC aluminum polyp that are filled with vegetable oil in the power supply so was just thinking if CD60 in that link could be good on the cathodes giving me a Electrolytic Cap free Amp or that was the idea
AS is my 12B4A Headphone Amp using the polyp solen caps sounds good too
#6
Because they are Elecrolytic with a plasic sleeve cover..brig001 wrote:Why would have poly cap be polarised?Will wrote:Have a look at this poly cap ......
http://www.ebay.co.uk/itm/Black-DC-20V- ... 634wt_1257.
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#7
CD60 is a class of motor starting capacitor - these are not polypropylene, they are an unpolarised aluminium electrolytic so that they work with AC - they need to be above 25uF or so to work and are only designed for low duty cycle - the eBay advert is wrong/lying.
Just search for "CD60 motor start"... "start" and "run" capacitors are different things... CD60s are "motor start", "CBB60" are "motor run" (and are often polypropylene). IEC/EN 60252-1/2 (AC motor capacitors. Motor start capacitors) covers this.
http://en.wikipedia.org/wiki/Motor_capa ... capacitors
Just search for "CD60 motor start"... "start" and "run" capacitors are different things... CD60s are "motor start", "CBB60" are "motor run" (and are often polypropylene). IEC/EN 60252-1/2 (AC motor capacitors. Motor start capacitors) covers this.
http://en.wikipedia.org/wiki/Motor_capa ... capacitors
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